Mean-median-standard deviation for carbon monoxide

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Reference no: EM1393379

Twenty air samples were obtained and the carbon monoxide concentrations were recorded. the results in ppm (parts per million) were:

9.3 10.7 8.5 9.6 12.2 15.6 9.2 10.5 9.0 13.2
11.0 8.8 13.7 12.1 9.8 10.5 11.2 9.9 12.4 10.9

a) Calculate the mean, the median and the standard deviation.

b) Obtain the mean, the median, and the standard deviation in the units parts per thousand without recalculating everything from scratch.

Reference no: EM1393379

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